Adjustable speed limit indicator



Nov. 23, 1937. E. J, GRAHAM 2,100,214

ADJUSTABLE SPEED LIMIT INDICATOR Original Filed March 28, 1936 A'ITORNEY.

Patented Nov. 23, 1937 UNITED STATES PATENT OFFICE ADJUSIABI SPEED LIMIT INDICATOR Elmer J. Graham, Denver, Colo., assigner 01 onchalf to Leslie E. Becs, Denvet, 0010,

Application March 28, i936, Seriai No. 71,479

Reaewed Octetser 5, 1937 This invention relates to an adjustable speed is conceaiedby the 1ea extremity i351. "he speed- 1imit inciicator for automotive vehicles, and has ometer kami 03 is provided With a forwaxcdly exfor its principal object the provision of a simple, tendimg contact stuc]. 2@ of sufiicient iength to highly eficient devie which can be preset b}? the contact with the back of the contact 23, when driver of an automobile at the maximum speed the two hands pass each othet. limit and which will give a warning signal et eut A flexible e1ectricai conductot 1eads from off the ignition of the automobile, When pre= the clamp screw 66 to any suitabie signal 01' comset limit is reached without fuither attention et 13301 devise, suchas diagrammaticaliy indicated the operator. at 263. The signal or contiol device is connected Another object of the invention is to se oon by means a suitabie conductor 2'?! to the car, i

stmct the device that it eau se appflec to osesent battery, diagrammaticaliy indicated at 28. The speedometers without affecting, or reqv mg any battery 28 is of cocasse groumded at its opposite change in, the speedometer mechanism. terminai as is usuai i 11 motos car design, the Other objects and advantages reside in the speedometey Ma 15 naturaliy grounded such as 15 detaii construction of the invention, which is indicated diagrammaticaiiy at 36 designed for simplicit economy, and efiiciency. Let us assume that et driver does not vrish tc lhcse Wiil become more apparent from the o= exceed a spsed 03 h miles heur. By lovving description. meams of the knob fl he sets ie kami at in the following detailect des:ripticz2 the thirty on tne speeciometer diai As the car invention reference is had to the accompanying speed incteases, the hand i3 approaches thehand drawing Which forme apart hereof. Like numerand the rear eztremity 3@ of the hand M ais refer like parts in all views ci the swings the contact tovvard the contact At and throughout the description. the time that the i3 passes directiy under in the dliWfingt the hand the contact 2 wiii icedirectiy under 25 Fig. iiiustrates the improved speeci 1imit inciithe contact and wiii have lifted the latter se 95 cator applied to a speedometer diai. as to sii tiy fier: the spring wire 22?. This' closes 2 iS a e a S on through the indJcat- 2, circuit item the. gilild 29 through the hanc1 in p n f the devi aken on the lime 22, the contact tri, the, contact the sprmg 22,

Fig. 1. the stud 2ZI, the kami 253, the conductor 2 to 30 Fig. 3 is an enlarged sectional view ci the axial the signal device 228, thereby g1ving vvaming to p0rti0n O Fig. the operator that the preset speeo of thirty miles A typical speedomcter is indicated at t With per hour has been seached.

its dia1 si; M, cover glass et M and speeci indicat nthe device 033 2&3 is simpy a signal device,

ing hand at i3. that is a Light or a sonne; producin device, the

n pp in the p n inv i n he sp driver mas; still increase bis speed if he desires. 35 t the cover glass is p v w a a! This ailovvs the contact si t pass from under the openi fo the p s of a a i i s d contact 23 so that the hand as may indcate the E 0rmed h a ed fi i ob incteased speed. No further indication will Toe Against each face of the cover glass, a fe1t vvasher given until the speed drops clown to the preset H sp d a o e ea e t W e s a metal speed, at vznich time the signal contacts wiil again 40 washer fit3. A spring washer I9 is piaced oeneath clo e, the knob 5 and t e nt e s y s a ped As before stated, the signal devise 26 may be the glass I2 by means o a clamp 'Sc w E, employed to short circuit the ignition system of which is threaded into the extremity ci. the stuc! the automobile if desired so that it W111 tee im- M. A speed limit hand 20 is clamped beneath possible foi a drives to exceed the preset speed 45 the head of the screw 16 so that it must rotate 1imit, with'the stud l4. While a specic form of the improvement mas The rear extremities of the hands i3 and 263 been described and iilustiated herein, it is desired are p ojected beyo d their s points as indito be understood that the same may be varied,

'50 cated at 30 and 3l, respectively. A spring stud within the scope of the appended claim, without 5c D j inwardly t e back of the hand departing from the spirit of the invention.

20. A lig s ght wire sp 22 15 pported Having thus describedthe invention, what is y the Stud 2| S0 chat 115 W111 extend p e claimed and desired secured bar Letters Patent the back of the hand 20 across the axis of the 1 speedometer, terminating in a contact 23 which In a, speed inflicgtng device having a diai and 55 a, speedometer hand fox nicating positions on said dia], means for closing an electrical circuit when sacld speedometer hand moches certain positions on said dia] comprising: a setting hend pivotally mountedl in axial aHgnment with saisi speedometer hand; a spring stud projectimg mwa.rdly from smd setting d towerd said speed ometer hand; a swing arm extending from sa.id

' stud p.rellel to said settflng hanoi ecxoss the axis thereof; a first contact on the latter extremity of said spring arm; a rear extremity on sed speed ometer hmd positioned diametflcally opposite to the latter; a, contact stud extending forwardly from said rear extremty, said first contact having a cylindrical surface sald contact stud termineting in the peth of said surface so that the sprihg as said two bonds pass each other; and means for placing saici contacts in an electric signal circuit. 4 v E.LJR J.'GRAHAM. 

